Chunk #109 — 3 Inverse solutions — 3.1 Non parametric optimization methods — 3.1.1 The Bayesian framework — MNE with FOCUSS (Focal underdetermined system solution)

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Review on solving the inverse problem in EEG source analysis.

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This is a recursive procedure of weighted minimum norm estimations, developed to give some focal resolution to linear estimators on distributed source models [5,27,29,30]. Weighting of the columns of G is based on the mag nitudes of the sources of the previous iteration. The Weighted Minimum Norm compensates for the lower gains of deeper sources by using lead-field normalization.